Alienware m17x r2 electrical buzzing noise

Hi all, cleaning out my alienware to open houses is avvere an electric buzz is not very strong ( in fact in case you do not feel closed ) state that :
- Removed all the laptop to see if it was something short but nothing
- Cloth used on a motherboard with only ssd to boot windows with passive video card all in just those 2 minutes to test with external vga screen and battery , still the same noise.
the noise looks like this:
Corsair tx650w coil whine - YouTube
but mine is much smaller , the other thing I thought it was the harddrive but it is only since leaving the ssd feels the same .
when I used only the motherboard and ssd on the cloth by placing the ear this sound comes right from the chipset on the motherboard , I had thought about changing the smd electrolytic capacitors but I do not know if they are ...
else trying to make a raid between 2 ssd with 2 different older versions of windows 7 32bit I installed the operating system, but with windows 7 64 bit tells me that the driver is not set by the bios as a boot disk (lol) , also being set wrong, same thing with new versions of win8 and win732bit 32/64bit , why? :S
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ah precise I would also go to this configuration:
i7 740QM
5870m only
1400x900
4gb ram
to
i7 920XM
7970M
1920x1200
16gb ram
then if I get the chance x2 raid 0 ssd 256GB samsung evo
I accept suggestions: P